Charleston asks more of a garage door than most cities. Salt air drifts in off the harbor and marshes, summers are long and humid, tides push water into low streets, and hurricane season is a fact of life. On top of that, Charleston adopted the nation's first historic district zoning in 1931, and design review still shapes what owners in the old city can change.
Whether you have a carriage house on a downtown lane or a two-car garage in a newer neighborhood across the rivers, read on for the parts that corrode first, how historic review and wind codes affect a replacement, and what to do when water or wind gets the better of a door.
Historic district doors and architectural review
Exterior changes in Charleston's historic districts that can be seen from the street generally need approval from the city's Board of Architectural Review. That can include replacing a garage or carriage-house door, changing its material, or adding windows. Approval comes before ordering, not after installation.
Many owners in these districts choose carriage-style overhead doors that look like traditional swing-out doors but open like a modern garage door. Ask early which materials and profiles are likely to be acceptable for your property, since rules can differ for highly visible facades and for structures on rear lanes.
Lowcountry corrosion: salt, humidity and marsh air
Hardware rusts quickly near the harbor and on the islands. Bottom brackets, cables and springs take the worst of it because they sit lowest and stay damp longest, and a cable that looks merely discolored may already be weakened inside. Galvanized parts are a minimum; stainless steel hardware is worth considering on waterfront homes.
Humidity works on wood. Wooden doors and jambs swell, stick and grow mildew, and termites are a constant concern in Lowcountry soil. Composite, fiberglass and aluminum doors hold up well, and insulated steel can perform if its finish stays intact and it gets rinsed with fresh water regularly.
- Rinse tracks and hardware every few weeks if you live near salt water.
- Look for orange streaks on cables and replace them before they fray.
- Check wooden jambs at the bottom for soft spots and termite damage.
- Leave cable, spring and bottom bracket work to a technician because of the stored tension.
Tidal flooding and elevated homes
King tides and heavy rain regularly flood low streets downtown and in parts of West Ashley, and a storm surge can put salt water into garages much farther inland. If water reaches your garage, rinse the bottom of the door, the tracks and the floor-level sensors with fresh water once it recedes, then have the springs, cables and opener wiring inspected.
On the islands and in flood zones, many homes are raised with parking or storage below. Ground-level enclosures there fall under floodplain rules about flood openings and materials, so check what is allowed before replacing a door in that space.
Wind ratings in the shadow of Hugo
Hurricane Hugo came ashore just north of the city in September 1989 as a major hurricane. Today, replacement doors in coastal Charleston County must be rated for the design wind pressure at the site, and in the wind-borne debris region any glass in the door has to be impact-resistant or protected. Many owners near the water go further and choose a fully impact-rated door.
A wind-rated door has a label showing its ratings and must be installed with the reinforcing struts and fasteners specified by the manufacturer. Pair it with an opener that has a battery backup, since summer storms can cut power for days.
Last updated by the American Garage Door Team.